Us Stamps To Canada

[789456123969]

how much will it cost to mail somthing from the US to Canada.
When its just the 9x12 envelope and 2 pictures.
How Many Us Forever Stamps Will i need?
And Is there a stamp in the US designed for International purposes? or a such thing as a .98 stamp?

thanks

[jdp3577]

if it weighs 2 oz. or less its $1.29, forever stamps are worth .44 right, so you would need 3
if its over 2 oz. but less then 3 it would be $1.55, which would take 4

a large envelope and SASE weigh less then 2 oz. but Im not sure how much weight the photos will add